Hi i downgraded from 600 to 300 mins as i regularly use under 300 my minutes refresh on the 17th.The day before O2 took 320mins which i had left and changed it for 10mins(they told me its the mins per day when your on 300mins).In my opinion its a bit naughty were they thinking i wouldnt check go over,therefore owe them more money.They could talk a way round it as they do but this shows no loyalty dont you think.

Sounds fine to me, you dropped to a lower tariff so they have pro-rated you mins on the new tariff.

well as we pay in advance ive all ready paid for those minutes they have taken away?

Yes that's what it sounds like to me. All networks do this not just O2. Its a bit of pain for customers as it can be confusing.

They will give you a Pro-Rata refund of your line rental at the higher rate, so you won't lose anything.

Ok cheers ill look out for this